Fixes https://github.com/flutter/flutter/issues/129744
Part of https://github.com/flutter/flutter/issues/129847

Migrate the packages_autoroller script to push to
flutter-pub-roller-bot/flutter.git, rather than
fluttergithubbot/flutter.git.

Fixes https://github.com/flutter/flutter/issues/128067

The newly updated lint will soon flag for-each in collections.

See discussion: https://github.com/dart-lang/linter/pull/4383

/cc @goderbauer

[conductor] Roll engine whenever version is out of date

[conductor] Remove cherrypick option

* lerp documentation

* Remove Note, Note That from repo

* Improve BorderSide documentation.

* apply review comments

* [conductor] Remove CiYaml model

* Remove package:yaml

* Update pubspec checksum

* [conductor] Tag engine versions

* Move tag to repository

* update console link

* update test to include new console link

[flutter_conductor] log to stderr but do not crash conductor if branch name validation fails (#99181)

* support commits past tagged stable release

* make better expectations

* added cleanContext

* using async

* added one more test

* lift git-rev-parse in conductor start
* remove localFlutterRoot from globals.dart
* make localFlutterRoot getter private
* fix analysis